Knife attachment for listers



Dec. 29, 1936. w, J JAEGER I 2,066,113

KNIFE ATTACHMENT FOR LISTER$ Filed March 10, 1936 5 A llorpey Patented Dec. 29, 1936 UNITED STATES PATENT OFFICE 3 Claims.

My invention relates generally to a weed cutting knife for attachment to listers, and particularly to an adjustable knife attachment enabling cutting down such weeds as grow at the time the corn is being listed, the said knife being adjustable to attach to either side of the lister, and an important object of the invention is to provide an arrangement of this character including brackets mounted on the moldboard of the lister and adapted to interchangeably mount the knife.

Another important object of my invention is to provide an arrangement of the character indicated above which includes a bracket and a knife thereon, the knife being adjustable relative to the bracket.

Other important objects of my invention will be apparent from a reading of the following description in connection with the drawing, wherein for purposes of illustration I have shown preferred embodiments of my invention.

In the drawing:-

Figure 1 is a general side elevational view of a lister showing the adjust-able shoulder knife in place thereon.

Figure 2 is a top plan view of the bracket and knife.

Figure 3 is a rear elevational view of another embodiment of the invention wherein the knife is arranged so as to be interchangeable to project from opposite sides of the lister.

Figure 4 is a top plan view of the weed knife shown in Figure 3.

Referring in detail to the drawing, and particularly to Figure 1, the numeral 5 generally designates the lister which comprises the moldboard 6 and the lister lay 1. To one side of the rear face of the wing of the lister is attached the rectangular plate 8 which has a bracket portion 9 extending upwardly and curvedly away from the plate 8 in a rearward direction and contains longitudinally spaced bolt receiving holes l and extra transversely spaced holes H adapted to receive the clamping bolts l2 and I3, the bolt l3 acting as a pivot for the vertical adjustment of the rearwardly and upwardly curving knife M which has the upwardly and rearwardly curved lower cutting edge Hi. It is to be observed that the plate 8 straddles the upper and lower edges of the moldboard and lister lay, respectively. By changing the position of the bolts in the holes of the bracket member 9 and in the holes of the front end of the knife Hi, the knife may be locked in elevated or depressed positions.

Referring to the embodiment of the invention shown in Figures 3 and 4, the numeral a generally designates the lister which is composed of the moldboard 6a the lister lay la. Brackets or clamps I6 and I1 straddle the upper and lower edges of the moldboard and lister lay, respectively, at opposite sides or along the opposite wings thereof and above these clamps l6 and I! are welded the brackets l8 and 19 which extend approximately at right angles from the rear face of the contiguous portion of the moldboard and spaced above the clamps I6 and [1. As illustrated in Figure 3, the knife which is generally designated Ma. is straight and flat and has the forwardly extending cutting edge 20 and the knife is wider atthe cutting portion thereof and terminates laterally inwardly in the shank portion 2| which is elongated and which has a pivot hole 22 therein receiving the pivot bolt 23 on the later-ally outward end of the bracket 19 or of the bracket l8. Laterally inwardly of the pivot hole 22 the shank portion of the knife has a lug 24 which is traversed by a horizontal adjusting bolt 25 which is arranged to engage the rear face of the moldboard to adjust the position of the knife Ma. Tightening the bolt 23 looks the knife in its adjusted position and it is obvious that the pressure of the work against the forwardly positioned cutting edge presses the end of the bolt into engagement with the back side of the moldboard and prevents yielding movement of the knife. If desired, the bolt 23 need not be used for clamping purposes but may be used merely as a pivot in which use it will not be securely tightened. It is obvious that by removing the bolt 23 the knife Ida. may be removed from the bracket l9 and a similar knife used upon the bracket I8 so as to extend from the left side of the lister instead of from 1. In a lister comprising a moldboard and a.

lister lay, means connecting the lower edge of the moldboard with the upper edge of the lister lay, said means including a bracket, and a knife adjustably mounted on said bracket for operating in a sphere laterally outwardly of one side of the lister. K,

2. In combination with a lister including a moldboard having opposed wings and a lister lay, brackets on opposite sides of the back of the wings of the moldboard, pivotally mounted knives on said brackets and including stop means engaging the rear side of the Wings. 7

3. In combination, a lister including a moldboard having opposed wings, a lister lay connected to the lower end of said moldboard, a bracket on each wing of said moldboard, a knife inter- 

